<script type="module" src="run.js"></script>
<textarea id="source" style="width: 100%; height: 500px;">
let a;
a = 1;
while(a < 10) {
    a = a + 1;
}
log(a);
</textarea>
<button id="run">run</button>

<!-- 
    let a;
a = 1;
if (a==1 && 0) {
    log(a);
}
while(a < 10) {
    a = a + 1;
}
log(a);
 -->
